Like the air and vacuum IB-slits, the aperture in the UHV version is defined by four independently movable and highly polished tungsten carbide blades. These blades are controlled by a high-precision in-vacuum guiding rail system. The guides are positioned close to the blades giving the shortest distance from the guide to the blade.

To avoid issues of UHV contamination and overheating of the motors, the high-resolution stepping motors are positioned outside the vacuum, and all motions are established via magnetically coupled feed-throughs.

In its basic configuration, the IB-C30-UHV slit is delivered with a flange-opening to allow connection with a CF-100 flange. Other flanges are also available upon request.

We recommend the option with internal linear UHV compatible encoders in order to obtain precise knowledge about the actual blade position.

2 mm thick tungsten carbide blades which can be mounted either with a 0.5 degrees knife-edge or a R16 radius edge Standard polishes are with a RMS roughness better than 25 nm
Other options are possible

Common options

Blades: Any number of blades can be accommodated, varying both in materials and shapes
Flanges: Flanges other than 100CF can be specified
Encoders: Internal UHV compatible Renishaw linear encoders can be employed to measure true motion locally
Leak-current: Means for extracting leak-current from the blades can be supplied
Viewport: Chambers can be fitted with viewports if desired.
Supports and position: Supports and means for fine position and alignment of the slit can be provided

For further product information, you can download technical specifications, technical drawings, wiring and connector possibilities, manuals and 3D files below.